This is by no means all the birds kept in open air/hoofstock yards, so please add anything you feel belongs here.
Ostrich
Emu
Greater rhea
Greater flamingo
African sacred ibis
White ibis
African spoonbill
Saddle-billed stork
Marabou stork
Yellow-billed stork
Blue crane
Black-crowned crane
East...
I wonder what sizes are typically deer parks and similar enclosed spaces where ungulates like red or fallow deer, blackbuck etc. live not physically separated from visitor paths. And what are the smallest / narrowest successful examples?